1242303431 has 2 divisors, whose sum is σ = 1242303432. Its totient is φ = 1242303430.

The previous prime is 1242303383. The next prime is 1242303463. The reversal of 1242303431 is 1343032421.

It is a strong prime.

It is an emirp because it is prime and its reverse (1343032421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1242303431 - 2⁶ = 1242303367 is a prime.

It is a super-2 number, since 2×1242303431² = 3086635629348743522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1242303397 and 1242303406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1242303631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621151715 + 621151716.

It is an arithmetic number, because the mean of its divisors is an integer number (621151716).

Almost surely, 2^1242303431 is an apocalyptic number.

1242303431 is a deficient number, since it is larger than the sum of its proper divisors (1).

1242303431 is an equidigital number, since it uses as much as digits as its factorization.

1242303431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1242303431 is about 35246.3250708496. The cubic root of 1242303431 is about 1075.0018910369.

Adding to 1242303431 its reverse (1343032421), we get a palindrome (2585335852).

The spelling of 1242303431 in words is "one billion, two hundred forty-two million, three hundred three thousand, four hundred thirty-one".